A farmer has 1200 feet of fence to enclose a rectangular plot of borders a river. the river will serve as one side of the paddock , so no fence is needed among the river. What is the maximum area that can be enclosed?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.